The case was the second human trafficking case to be successfully prosecuted in recent weeks, and police said it's a sign of a refocused effort to stop human trafficking.

Prosecutors said Nathaniel Clarke had seven women working for him, and he controlled their every move.

"He preyed upon women who were in a tough spot in their lives, already addicted to narcotics," Assistant Hillsborough County Attorney Gregory Lenti said.

Investigators said Clarke used addiction as a way to manipulate women by forcing them into a life of prostitution, giving them a hit if they worked and withholding the drugs if they refused.

"There was violence, beatings, threats of more violence," Lenti said. "He would beat other girls to show them it could happen to them next."

Clarke was sentenced Monday to 10 to 20 years in prison. The sentence came weeks after Donald Kaplan pleaded guilty to similar crimes and was given a 5- to 10-year sentence.

Investigators said Kaplan picked up a woman at a Queen City intersection, offered her heroin and then also used the drugs against her.

"Obviously, we are not going to tolerate this," Assistant Chief Carlo Capano said. "We are going to work together and use whatever resources we have to prosecute these people."

Both arrests were made by Manchester police working with the Department of Homeland Security. At a news conference Monday, authorities said the arrests should send a message that such criminals can't fly under the radar. Investigators said law enforcement is working for the victims.

"We can't make these cases without a survivor coming forward and providing key testimony," said Mike Posanka of Homeland Security.

Officials said they are doing everything they can to provide help to survivors so they can start to turn their lives around and not be victimized again.

Police said they believe that other people were working with Clarke, and the Hillsborough County Attorney's Office said there are two cases pending.